通风网络中的三大定律是什么?

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问题:

通风网络中的三大定律是什么?

考点:煤矿矿井测风测尘工煤矿矿井测风测尘工题库
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I have two friends.        names are Lucy and Lily. They are twins(双胞胎). They        from the USA.

Lucy and Lily look the same.        have blue eyes and brown hair. They are thirteen      old. But they are in different clothes. Red is        favorite color. She is often(经常)in red. But this morning,        coat is yellow and her pants        blue and she has brown shoes. Lily likes green. This morning she is        a green skirt and her shoes are green, too.

They often help me with my English.        are in the same grade, but in different       .

小题1:A.Their               B.They                 C.Theirs

小题2:A.comes               B.come                C.is

小题3:A.They’re            B.They                 C.Their

小题4:A.year                B.year’s              C.years

小题5:A.Lucy’s             B.Lucy                 C.Lucys’

小题6:A.she             B.he                   C.her

小题7:A.are             B.is                   C.be

小题8:A.at                  B.from                 C.in

小题9:A.Our             B.We                   C.Us

小题10:A.class              B.classes              C.Grade

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重度主动脉缩窄最佳检查方法是()

A、CT。 

B、股动脉插管X线主动脉造影。 

C、上肢动脉插管X线升主动脉造影。 

D、X线右心室和肺动脉造影。 

E、MRI。 

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底材应很好的干燥,底材表面的温度较气温低时易揭露。所以,底材表面温度必须比大气温度高()℃。

A.2~3

B.1~2

C.1~3

D.1~4

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中年男性,左小脑半球梗死,查体:指鼻试验能完成指定的活动,但动作速度慢、笨拙、不稳定。在增加运动速度时,完成活动的节律性更差。按协调功能评分标准应评()

A.1分

B.2分

C.3分

D.4分

E.5分

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设置分段永久缝的作用之一是为适应()。

A.沉陷

B.不均匀沉陷

C.坡度

D.均匀沉陷

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